GROWTH DEVELOPMENT CHILD
INDIVIDUAL DIFFERENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an increasing slope
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a normal bell curve
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an equilateral figure
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a negative correlation
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Detailed explanation-1: -Based on the 68-95-99.7 Rule, approximately 68% of the individuals in the population have an IQ between 85 and 115. Values in this particular interval are the most frequent. Approximately 95% of the population has IQ scores between 70 and 130. Approximately 99.7% of the population has IQ scores between 55 and 145.
Detailed explanation-2: -IQ test scores are derived from a Bell Curve distribution with a mean value and standard deviations The normed IQ score of the general population is 100, therefore; 100 is the center of the distribution. For most IQ tests, the standard deviation range is usually 15 points.
Detailed explanation-3: -The standard deviation is a measure of spread, in this case of IQ scores. A standard deviation of 15 means 68% of the norm group has scored between 85 (100 – 15) and 115 (100 + 15). Less than 60% of people have earned at least a 100.
Detailed explanation-4: -Because an individual’s score on an IQ test depends on a very large number of hereditary and environmental factors, the central limit theorem explains why the distribution of IQ scores is approximately normal.